Garbage pit gas collecting cover with continuous automatic deslagging function

Abstract

This invention proposes a waste pit gas collection hood with continuous automatic slag discharge function, solving the problem that existing slag cleaning filters, with their mesh structure, have difficulty scraping off adhered fibrous materials. The main solution includes: an outer casing and a negative pressure filter cylinder laterally rotatably connected within the outer casing. One end of the outer casing has an air inlet arranged axially with the negative pressure filter cylinder. Static pressure cavities corresponding to the air inlets are fixed at both ends of the negative pressure filter cylinder. The air inlets are subjected to reverse negative pressure suction via an external centrifugal fan. A flexible seal is used between the static pressure cavities and the filter cylinder to maintain static pressure. The static pressure cavities are equipped with pneumatic components, which, through a pneumatic connection with an external air compressor, ensure positive pressure at the overlap between the static pressure cavities and the filter cylinder, causing slag adhering to the outside of the filter cylinder to detach. A drive component is also fixed to the outer casing to servo-rotate the negative pressure filter cylinder.

Description

Technical Field

[0001] This invention relates to the field of waste treatment technology, and in particular to a waste pit gas collection hood with continuous automatic slag discharge function. Background Technology

[0002] Odors from general municipal solid waste transfer stations and incineration plants are typically collected under negative pressure and treated by end-of-pipe deodorization systems. The waste disposal pit is the primary odor source within the station, and suction hoods are usually placed nearby inside the pit to effectively collect the odors. However, during waste dumping, lighter materials are carried by the airflow and adhere to the surface of the suction hood. To ensure stable operation of the end-of-pipe treatment equipment, the suction hood is equipped with filters. This results in a large amount of light material being trapped on the surface of the suction hood, causing blockages and ultimately reducing the efficiency of odor collection from the waste disposal pit, leading to severe odor overflow from the pit.

[0003] From the perspective of airflow organization, most of the current gas collection hoods are set at the back of the unloading pit. However, there is a long distance between the unloading door and the gas collection hood, and personnel and machines cannot clean the air intake in time, which is a major reason for the overflow of odor from the garbage pit.

[0004] Insufficient existing technology

[0005] 1. The existing automatic slag removal suction port is driven by a motor, which poses a certain safety risk when there is dust and high concentration of malodorous gas in the material pit;

[0006] 2. Lacking a static pressure zone, it is impossible to simultaneously achieve the functions of slag filtration and slag discharge;

[0007] 3. The slag removal filter screen has a mesh structure, which makes it easier for fibrous materials to adhere and difficult to be scraped off by the scraper;

[0008] 4. Lack of backflushing results in poor material removal. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes a gas collection hood that realizes synchronous filtration and slag removal at the air intake of the material pit by static pressure backflushing.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a waste pit gas collection hood with continuous automatic slag discharge function, comprising: an outer box and a negative pressure filter cylinder horizontally rotatably connected to the outer box. An air inlet is provided at the bottom of one end of the outer box, which is axially arranged with the negative pressure filter cylinder. Static pressure cavities corresponding to the air inlets are also fixed at both ends of the negative pressure filter cylinder. The air inlets are reverse negative pressure suctioned by an external centrifugal fan. The static pressure cavity and the filter cylinder are flexibly sealed to maintain the static pressure of the static pressure cavity. The static pressure cavity is equipped with a pneumatic component, which is blown by an external air compressor to ensure that a positive pressure is formed at the position where the static pressure cavity overlaps with the filter cylinder, so that the slag adhering to the outside of the filter cylinder falls off. A drive component for servo rotation of the negative pressure filter cylinder is also fixed on the outer box.

[0011] Furthermore, the static pressure cavity has a U-shaped groove structure with its opening facing the air inlet, and its groove direction is arranged axially with the negative pressure filter cylinder. The joints between the two ends of the static pressure cavity and the inner side of the negative pressure filter cylinder are sealed with rubber.

[0012] Furthermore, the outer casing is also provided with a downward-sloping rubber scraper at the air inlet. The rubber scraper is arranged axially with the negative pressure filter cylinder, and one side of it is connected and fixed to the air inlet by a fixing rib. A reinforcing rib is also fixed at the connection between the rubber scraper and the fixing rib.

[0013] Furthermore, the pneumatic component includes a backflush pipe and backflush nozzles. The backflush pipe is horizontally fixed in the slot of the static pressure cavity, with both ends exposed outside the outer casing for air intake. The backflush nozzles include multiple sets that are equidistantly connected to the backflush pipe.

[0014] Furthermore, the negative pressure filter cylinder includes a roller shaft and a filter cylinder. The roller shaft passes coaxially through the center of the filter cylinder and is fixedly connected to the inner wall of the filter cylinder via a three-lobed fixing rod on the outer wall. The surface of the filter cylinder is evenly distributed with filter holes, and both ends of the roller shaft are connected to bearings on the inner wall of the outer casing.

[0015] Furthermore, the driving component includes a pneumatic motor, a transmission chain, and transmission gears. The bottom of the pneumatic motor is fixed to the top of the outer casing by a balance adjustment nut. The transmission gears include two gears, which are coaxially connected to the output end of the pneumatic motor and the center of the roller shaft, respectively. The transmission chain meshes with the two transmission gears.

[0016] Furthermore, one side of the outer casing is an exhaust port, and the roller shaft and the outer casing are softly sealed at the exhaust port connection. The exhaust port is connected to an external centrifugal fan through a sealing flange. Each exhaust port has a fixing rib extending from both ends. The ends of the fixing ribs are bent to embed into the negative pressure filter cylinder, and a sealing rubber is fixed at the bend by fixing rivets.

[0017] Furthermore, the backflush pipe is supplied with compressed air via an external air compressor, with a flow rate of 500 L / min.

[0018] Furthermore, the drive motor is supplied with compressed air via an external air compressor, with a flow rate of 200L / min.

[0019] Compared with the prior art, the beneficial effects of the present invention include:

[0020] (1) A drum filter is used, and the drum is made of perforated plate to reduce the adhesion of debris;

[0021] (2) The device uses compressed air as a power source to reduce the safety hazards caused by motor drive in the material pit;

[0022] (3) The filter cylinder is equipped with a negative pressure filtration zone and a static pressure zone, which can simultaneously filter and remove slag during operation, and can achieve continuous slag removal.

[0023] (4) A back-blowing device is set up in the static pressure zone to enhance the removal of slag, which fundamentally solves the problem that the slag cannot be removed in time from the air intake of the material pit. Attached Figure Description

[0024] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0025] Figure 1 The schematic diagram shows a schematic representation of an outer casing structure according to an embodiment of the present invention;

[0026] Figure 2 The schematic diagram shows a side view of the negative pressure filter cylinder structure according to an embodiment of the present invention;

[0027] Figure 3 The schematic diagram shows the internal structure of an automatic slag discharge and gas collection hood according to an embodiment of the present invention.

[0028] Figure 4 The illustration shows a proposal based on one embodiment of the present invention. Figure 3 Enlarged view of part A.

[0029] The following components are labeled in the diagram: 1. Outer casing; 2. Negative pressure filter cylinder; 21. Roller shaft; 22. Filter cylinder; 23. Fixing rod; 24. Filter hole; 3. Air inlet; 4. Static pressure cavity; 5. Pneumatic component; 51. Backflush pipe; 52. Backflush nozzle; 6. Drive component; 61. Pneumatic motor; 62. Drive chain; 63. Drive gear; 64. Balance adjustment nut; 7. Rubber scraper; 8. Fixing rib; 9. Reinforcing rib; 10. Exhaust port; 11. Fixing nut; 12. Fixing rib; 13. Fixing rivet; 14. Sealing rubber. Detailed Implementation

[0030] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0031] According to one embodiment of the present invention, Figures 1-4 As shown.

[0032] In this embodiment, the waste pit gas collection hood with continuous automatic slag discharge function includes: an outer casing 1 and a negative pressure filter cylinder 2 rotatably connected to the outer casing 1. An air inlet 3 is provided at one bottom of the outer casing 1 and arranged axially with the negative pressure filter cylinder 2. Static pressure cavities 4 corresponding to the air inlets 3 are also fixed at both ends inside the negative pressure filter cylinder 2. The air inlets 3 are suctioned by reverse negative pressure through an external centrifugal fan. The static pressure cavity 4 and the filter cylinder 22 are flexibly sealed to maintain the static pressure of the static pressure cavity 4. The static pressure cavity 4 is provided with a pneumatic component 5 and is purged by an external air compressor through the pneumatic component 5 to ensure that the position where the static pressure cavity 4 overlaps with the filter cylinder 22 is positively pressured, so that the slag adhering to the outside of the filter cylinder 22 falls off. A drive component 6 for servo rotation of the negative pressure filter cylinder 2 is also fixed on the outer casing 1.

[0033] like Figure 1 and Figure 3 As shown, the static pressure cavity 4 has a U-shaped groove structure with its opening facing the air inlet 3. The groove direction is axially aligned with the negative pressure filter cylinder 2. The joints between the two ends of the static pressure cavity 4 and the inner side of the negative pressure filter cylinder 2 are sealed with rubber. The outer casing 1 also has a downward-sloping rubber scraper 7 corresponding to the air inlet 3. The rubber scraper 7 is axially aligned with the negative pressure filter cylinder 2, and one side of it is connected and fixed to the air inlet 3 via a fixing rib 8. A reinforcing rib 9 is also fixed at the connection between the rubber scraper 7 and the fixing rib 8.

[0034] like Figure 3As shown, the pneumatic component 5 includes a backflush pipe 51 and a backflush nozzle 52. The backflush pipe 51 is horizontally fixed in the slot of the static pressure cavity 4, with both ends exposed outside the outer casing 1 for air intake. The backflush nozzle 52 includes multiple sets that are equidistantly connected to the backflush pipe 51. The negative pressure filter cylinder 2 includes a roller shaft 21 and a filter cylinder 22. The roller shaft 21 coaxially passes through the center of the filter cylinder 22 and is fixedly connected to the inner wall of the filter cylinder 22 via a three-lobe fixing rod 23 on the outer wall. The surface of the filter cylinder 22 is evenly distributed with filter holes 24. Both ends of the roller shaft 21 are connected to the inner wall of the outer casing 1 by bearings.

[0035] like Figure 3 As shown, regarding the selection of the drive component 6, in this embodiment, the drive component 6 includes a pneumatic motor 61, a transmission chain 62, and transmission gears 63. The bottom of the pneumatic motor 61 is fixed to the top of the outer housing 1 by a balance adjustment nut 64. The transmission gears 63 include two gears, which are respectively coaxially connected to the output end of the pneumatic motor 61 and the center of the roller shaft 21. The transmission chain 62 meshes with the two transmission gears 63.

[0036] Similarly, to ensure the sealing of the internal negative pressure filter cylinder 2, for the exhaust port 10 on one side of the outer casing 1, this application provides a soft seal at the connection between the roller shaft 21 and the outer casing 1 at the exhaust port 10. The exhaust port 10 is connected to an external centrifugal fan. Each exhaust port 10 has a fixing rib 12 extending from both ends. The ends of the fixing rib 12 are bent to embed into the negative pressure filter cylinder 2, and a sealing rubber is fixed at the bend by a fixing rivet 13.

[0037] In this embodiment, based on the above structure, the negative pressure filter cylinder 2 is a perforated plate with a flow velocity of 3 m / s and a surface wind velocity of 1 m / s. The inner side of the negative pressure filter cylinder 2 is connected to the roller shaft via a fixing rod 23. The joint between the static pressure cavity 4 and the inner side of the negative pressure filter cylinder 2 is sealed with rubber, leaving a 1 mm gap. A compressed air backflush pipe 51 is installed inside the static pressure cavity 4. A backflush nozzle 52 is installed on the compressed air backflush pipe 51. The roller shaft is connected to the roller shaft drive gear 63. The roller shaft drive gear 63 is connected to the pneumatic motor 61 drive gear 63 drive wheel via ABS drive chain 62; the pneumatic motor 61 drive gear 63 is connected to the pneumatic motor 61; the pneumatic motor 61 is supplied with compressed air by an external air compressor, with an air volume of 200L / min; the pneumatic motor 61 is connected to the outer housing 1 via the pneumatic motor 61 balance adjustment nut 64; the backflush nozzle air inlet is supplied with compressed air by an external air compressor, with an air volume of 500L / min.

[0038] This application incorporates a filtration zone and a static pressure zone within the negative pressure filter cylinder 22, enabling simultaneous filtration and removal of slag during actual operation, thus achieving continuous slag removal. The static pressure zone is equipped with a back-blowing device to enhance slag removal, fundamentally solving the problem of the material pit's air intake not being able to remove slag in a timely manner.

[0039] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A waste sludge pit gas collection hood with continuous automatic slag discharge function, characterized in that, include: The outer casing and the negative pressure filter cylinder are rotatably connected to the outer casing. An air inlet is opened at the bottom of one end of the outer casing and is axially arranged with the negative pressure filter cylinder. Static pressure cavities corresponding to the air inlets are fixed at both ends of the negative pressure filter cylinder. The air inlets are reversed by a centrifugal fan to draw air in under negative pressure. The static pressure cavities are flexibly sealed with the inside of the filter cylinder to maintain static pressure in the static pressure cavities. The static pressure cavities are equipped with pneumatic components and are purged by an external air compressor to ensure that positive pressure is formed at the overlapping position of the static pressure cavities and the filter cylinder, so that the slag adhering to the outside of the filter cylinder falls off. A drive component for servo rotation of the negative pressure filter cylinder is also fixed on the outer casing. The static pressure cavity has a U-shaped groove structure with its opening facing the air inlet. The groove direction is arranged axially with the negative pressure filter cylinder. The joints between the two ends of the static pressure cavity and the inner side of the negative pressure filter cylinder are sealed with soft seals or rubber seals. The negative pressure filter cylinder includes a roller and a filter cylinder. The roller passes coaxially through the center of the filter cylinder and is fixedly connected to the inner wall of the filter cylinder via a three-lobed fixing rod on the outer wall. The surface of the filter cylinder is evenly distributed with filter holes, and both ends of the roller are connected to the bearings on the inner wall of the outer casing.

2. The waste pit gas collection hood with continuous automatic slag discharge function according to claim 1, characterized in that: The outer casing is also provided with a downward-sloping rubber scraper at the air inlet. The rubber scraper is arranged axially with the negative pressure filter cylinder, and one side of it is connected and fixed to the air inlet by a fixing rib. A reinforcing rib is also fixed at the connection between the rubber scraper and the fixing rib.

3. The waste pit gas collection hood with continuous automatic slag discharge function according to claim 2, characterized in that: The pneumatic component includes a backflush pipe and backflush nozzles. The backflush pipe is horizontally fixed in the slot of the static pressure cavity, with both ends exposed outside the outer casing for air intake. The backflush nozzles include multiple sets that are equidistantly connected to the backflush pipe.

4. The waste pit gas collection hood with continuous automatic slag discharge function according to claim 1, characterized in that: The driving component includes a pneumatic motor, a transmission chain, and transmission gears. The bottom of the pneumatic motor is fixed to the top of the outer casing by a balance adjustment nut. The transmission gears include two gears, which are coaxially connected to the output end of the pneumatic motor and the center of the roller shaft, respectively. The transmission chain meshes with the two transmission gears.

5. The waste pit gas collection hood with continuous automatic slag discharge function according to claim 1, characterized in that: One side of the outer casing is an exhaust port. The roller shaft and the outer casing are softly sealed at the exhaust port connection. The exhaust port is connected to an external centrifugal fan through a sealing flange. Each exhaust port has a fixing rib extending from both ends. The ends of the fixing ribs are bent to embed into the negative pressure filter cylinder, and a sealing rubber is fixed at the bend by fixing rivets.

6. The waste pit gas collection hood with continuous automatic slag discharge function according to claim 3, characterized in that: The backflush pipe is supplied with compressed air via an external air compressor, with a flow rate of 500 L / min.

7. The waste pit gas collection hood with continuous automatic slag discharge function according to claim 4, characterized in that: The pneumatic motor provides compressed air via an external air compressor, with a flow rate of 200L / min.

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